4 开槽沉头螺钉和开槽半沉头螺钉GB/T 68、GB/T 69一2000标准
开槽沉头螺钉和开槽半沉头螺钉GB68、GB69一2000标准
国标原文档下载:GB/T 68-2000.pdf, GB/T68-2016.pdf
开槽沉头螺钉和开槽半沉头螺钉的尺寸规格、质量见表4.2-6〜表4.2-8。
表4.2-6 开槽沉头螺钉和开槽半沉头螺钉的尺寸规格(mm)
用途:
沉头螺钉主要用于不允许钉头露出的场合。半沉头螺钉与沉头螺钉相似,但头部弧形顶端略露在外面,比较美观和光滑,多用于仪器或比较精密的机件上。
螺纹规格d (6g) | Ml.6 | M2 | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 | |
a | max | 0.7 | 0.8 | 0.9 | 1 | 1.4 | 1.6 | 2 | 2.5 | 3 |
b min | 25 | 25 | 25 | 25 | 38 | 38 | 38 | 38 | 38 | |
dk | max | 3 | 3.8 | 4.7 | 5.5 | 8.4 | 9.3 | 11.3 | 15.8 | 18.3 |
K | max | 1 | 1.2 | 1.5 | 1.65 | 2.7 | 2.7 | 3.3 | 4.65 | 5 |
n | 公称 | 0.4 | 0.5 | 0.6 | 0.8 | 1.2 | 1.2 | 1.6 | 2 | 2.5 |
rf ≈ | 3 | 4 | 5 | 6 | 9.5 | 9.5 | 12 | 16.5 | 19.5 | |
t min | GB/T69 | 0.64 | 0.8 | 1 | 1.2 | 1.6 | 2 | 2.4 | 3.2 | 3.8 |
GB/T68 | 0.32 | 0.4 | 0.5 | 0.6 | 1 | 1.1 | 1.2 | 1.8 | 2 | |
l① 商品规格范围 | 2.〜16 | 3~20 | 4~25 | 5~30 | 6-40 | 8~50 | 8~60 | 10~80 | 12~80 |
①公称长度系列为:2.5、3、4、5、6〜16(2进级)、20〜80 mm(5 mm进级)。
表4.2-7 开槽沉头螺钉的质量(kg)
每1000件钢制品的大约质量
l | G | l | G | l | G | l | G | l | G | l | G | l | G | l | G | l | G | l | G |
Ml.6 | M2 | M2.5 | M3 ‘ | (M3.5) | M4 | M5 | M6 | M8 | M10 | ||||||||||
2.5 | 0.053 | 3 | 0.101 | 4 | 0.206 | 5 | 0.335 | 6 | 0.633 | 6 | 0.903 | 8 | 1.48 | 8 | 2.38 | 10 | 5.68 | 12 | 9.54 |
3 | 0.058 | 4 | 0.119 | 5 | 0.236 | 6 | 0.379 | 8 | 0.753 | 8 | 1.06 | 10 | 1.72 | 10 | 2.73 | 12 | 6.32 | (14) | 10.6 |
4 | 0.069 | 5 | 0.137 | 6 | 0.266 | 8 | 0.467 | 10 | 0.873 | 10 | 1.22 | 12 | 1.96 | 12 | 3.08 | (14) | 6.96 | 16 | 11.6 |
5 | 0.081 | 6 | 0.152 | 8 | 0.326 | 10 | 0.555 | 12 | 0.993 | 12 | 1.37 | (14) | 2.2 | (14) | 3.43 | 16 | 7.6 | 20 | 13.6 |
6 | 0.093 | 8 | 0.193 | 10 | 0.386 | 12 | 0.643 | (14) | 1.11 | (14) | 1.53 | 16 | 2.44 | 16 | 3.78 | 20 | 8.88 | 25 | 16.1 |
8 | 0.116 | 10 | 0.231 | 12 | 0.446 | (14) | 0.731 | 16 | 1.23 | 16 | 1.68 | 20 | 2.92 | 20 | 4.48 | 25 | 10.5 | 30 | 18.7 |
10 | 0.139 | 12 | 0.268 | (14) | 0.507 | 16 | 0.82 | 20 | 1.47 | 20 | 2 | 25 | 3.52 | 25 | 5.36 | 30 | 12.1 | 35 | 21.2 |
12 | 0.162 | (14) | 0.306 | 16 | 0.567 | 20 | 0.996 | 25 | 1.77 | 25 | 2.39 | 30 | 4.12 | 30 | 6.23 | 35 | 13.7 | 40 | 23.7 |
(14) | 0.185 | 16 | 0.343 | 20 | 0.687 | 25 | 1.22 | 30 | 2.07 | 30 | 2.78 | 35 | 4.72 | 35 | 7.11 | 40 | 15.3 | 45* | 26.2 |
16* | 0.208 | 20* | 0.417 | 25* | 0.838 | 30* | 1.44 | 35* | 2.37 | 35 | 3.17 | 40 | 5.32 | 40 | 7.98 | 45* | 16.9 | 50 | 28.8 |
40* | 3.56 | 45* | 5.92 | 45* | 8.86 | 50 | 18.5 | (55) | 31.3 | ||||||||||
50 | 6.52 | 50 | 9.73 | (55) | 20.1 | 60 | 33.8 | ||||||||||||
(55) | 10.6 | 60 | 21.7 | (65) | 36.3 | ||||||||||||||
60 | 11.5 | (65) | 23.3 | 70 | 38.9 | ||||||||||||||
70 | 24.9 | (75) | 41.4 | ||||||||||||||||
(75) | 26.5 | 80 | 43.9 | ||||||||||||||||
80 | 28.1 |
注:1. l小于或等于带*号的螺钉,制出全螺纹。
2.表列规格为商品规格。尽可能不采用括号内的规格。
表4.2-8 开槽半沉头螺钉的质量(kg)
每1000件钢制品的大约质量
l | G | l | G | l | G | l | G | l | G | l | G | l | G | l | G | l | G | l | G |
Ml.6 | M2 | M2.5 | M3 | (M3.5) | M4 | M5 | M6 | M8 | M10 | ||||||||||
2.5 | 0.062 | 3 | 0.119 | 4 | 0.242 | 5 | 0.395 | 6 | 0.729 | 6 | 1.07 | 8 | 1.73 | 8 | 2.79 | 10 | 6.89 | 12 | 11.4 |
3 | 0.067 | 4 | 0.138 | 5 | 0.272 | 6 | 0.439 | 8 | 0.849 | 8 | 1.23 | 10 | 1.97 | 10 | 3.14 | 12 | 7.53 | (14) | 12.5 |
4 | 0.078 | 5 | 0.156 | 6 | 0.302 | 8 | 0.527 | 10 | 0.969 | 10 | 1.39 | 12 | 2.21 | 12 | 3.49 | (14) | 8.17 | 16 | 13.5 |
5 | 0.09 | 6 | 0.175 | 8 | 0.362 | 10 | 0.615 | 12 | 1.09 | 12 | 1.54 | (14) | 2.45 | (14) | 3.84 | 16 | 8.81 | 20 | 15.5 |
6 | 0.102 | 8 | 0.212 | 10 | 0.422 | 12 | 0.703 | (14) | 1.21 | (14) | 1.7 | 16 | 2.69 | 16 | 4.19 | 20 | 10.1 | 25 | 18 |
8 | 0.125 | 10 | 0.249 | 12 | 0.482 | (14) | 0.791 | 16 | 1.33 | 16 | 1.85 | 20 | 3.17 | 20 | 4.89 | 25 | 11.7 | 30 | 20.6 |
10 | 0.145 | 12 | 0.287 | (14) | 0.543 | 16 | 0.879 | 20 | 1.57 | 20 | 2.17 | 25 | 3.77 | 25 | 5.77 | 30 | 13.3 | 35 | 23.1 |
12 | 0.165 | (14) | 0.325 | 16 | 0.603 | 20 | 1.06 | 25 | 1.87 | 25 | 2.56 | 30 | 4.37 | 30 | 6.64 | 35 | 14.9 | 40 | 25.6 |
(14) | 0.185 | 16 | 0.362 | 20 | 0.723 | 25 | 1.28 | 30 | 2.17 | 30 | 2.95 | 35 | 4.97 | 35 | 7.52 | 40 | 16.5 | 45* | 28.1 |
16* | 0.205 | 20* | 0.436 | 25* | 0.874 | 30* | 1.5 | 35* | 2.47 | 35 | 3.34 | 40 | 5.57 | 40 | 8.39 | 45* | 18.1 | 50 | 30.7 |
40* | 3.73 | 45* | 6.16 | 45* | 9.27 | 50 | 19.7 | (55) | 33.2 | ||||||||||
50 | 6.76 | 50 | 10.1 | (55) | 21.3 | 60 | 35.7 | ||||||||||||
(55) | 11 | 60 | 22.9 | (65) | 38.2 | ||||||||||||||
60 | 11.9 | (65) | 24.5 | 70 | 40.8 | ||||||||||||||
70 | 26.1 | (75) | 43.3 | ||||||||||||||||
(75) | 27.7 | 80 | 45.8 | ||||||||||||||||
80 | 29.3 |
注:1. l小于或等于带*号的螺钉,制出全螺纹。
2.表列规格为商品规格。尽可能不采用括号内的规格。